Method of making mottled enamel.



rrnn STATES PATENT OFFICE.

JAMES DANVER, OF BEAVER. PENNSYLVANIA' ASSIGNOR T UNITED STATES SANL TAR'Y MANUFACTURING COMPANY, OF TION OF PENNSYLVANIA.

II'I"ISBU'RGr PENNSYLVANIA, A CORPORA- METHOD OF MAKING MOTTLED ENAMEL.

No Drawing.

invented a new anduseful Method of Making Mottled Enamel, of which the following 15 a full, clear, and exactdescription.

-My invention relatesto providing metallic articles, such as sinks, laundry tubs,

' &c., with a mottled enamel surface, and is inixing glass cullet (preferably clear portion of about 90 to 95 per cent, the remainder consisting of the coloring material such asmetallic oxid. The glass of each batch thus made up is then fused so as to disseminate the coloring material throughout the glass body or carrier. The oxid for one batch is preferably of one color,

such as blue, while the other oxid for the other batch is ')referably of another color. suchas brown or red. The two "fused batches of glass of different colors are then separately ground up, preferably to a slightly larger size than that of the white or lighter colored enamel with which they are mixed.

The use of two different colors gives a stronger and more pronounced appearance than with former processes. The shade or tintinay also be varied by varying the proportions of the two coloring materials. If the coloring materials of different colors were fused in the same glass batch, the tint or shade could hot be varied and adead appearance would be imparted. Further more. a more uniform effectcan be obtained, since in the use of a single mix of the color ing material the particulardegree of heat applied will vary the intensity of the color tosome extent, and hence, where the same proportions of the final mix are used. the tint or color will be darkened or made lighter with different batches. This can be corrected by the use of the two different Specification of Letters Patent.

Application filed November 30. 1909. Serial No. 530,683.

Patented Aug. 22, 1911.

color batches--11 increasing or decreasing the percentage of one of the coloring ingredients. i 7

After the two or more colored glass batches have been made and ground up they are mixed in the usual way and in the desired prtmortions with ground-up white enamel, which latter has been ground preferably to a greater degree of fineness than the colored batches. The three or more mixed materials are "then sifted upon the metallic surfaces. which is preferably preheated. The article is then heated to the ordinary temperature'for fusing the white enamel. A base coat may be used on the article before the mottli'ng coat of enamel is appliechand two or more mottling coats may be applied successively.

The advantages of my invention result from the use of glass *as a carrier forthe coloringredients, and also from .the use of two or more batches of coloring materials of different colors,

\Vithin my broader claims covering the use of different colors, the colored material may be glass or enamel; and ,many other changes may be made in the process without departing from my invention.

I claim 1. In the method of making mottled or colored enamel. the steps consisting of mi. ing coloring material with glass, fusing the same. comminuting the resulting colored gl'ass, and mixing this comminuted mate rial with a differently colored enamel, substantially as described.

2. In the method of making mottled or colored enamel, the steps consisting of mixing metallic oxid withlglass. fusing the same, comminuting the resulting colored glass. arid then mixing the comminuted colored glass with enamel of a lighter color, substantially as described.

Tn the-method of making mottled or colored enamel. the steps consisting of separately fusing two or more'batches of color ing material of different colors, grinding the same and mixing the different colors with a white or relatively lighter enamel; substantially as described.

4-. In the method of making mottled or colored enamel. the steps consisting of fusing two or more portions of coloring material of different colors with different batches 10 glass, and mixing this colored glass While of glass', fusing the same separately; grindin a dry comminuted form with a-eommi-.- ing the resulting materials separately and nuted differently colored dry enamelysub mixing two or more of said coloring matestanti ally as described. I I rials with White or relatively lighter enamel; In testimony whereof, I have hereunto set substantially as decribed. my hand.

5.111 the method of making mottled or r I J H colored enamel, the steps consisting of mixl ing coloring material with glass, fusing the i l/Vitnesses: same, eoinminu-ting the eulting coloredg' C. P. BYRNES,

i H. M. CORWIN. 

